Overall, I'm pleased with this unit.  It makes clear ice cubes relatively quickly.  The container holds plenty of water (I have to re-fill it about once a day, which is actually less frequently that I had anticipated), and cleaning the interior of the unit is a relatively painless task.

The reason I'm giving it four stars instead of five is:  the first two units I had were defective (both developed a leak from the bottom-side of the unit).  Fortunately, Luma's customer support was _terrific_ in replacing both of the defective units (they paid the shipping costs to return the units via FedEx), and, so far, "third time is a charm" on the current unit (have had it for almost 6 months with no issues).

Overall, would definitely recommend this unit, and am especially pleased with Luma's prompt handling of issues.